Xenon Blue
No Hard Feelings
What do you mean, eh! Greninja is Ash's only fully evolved Water type starter, as Ash-Greninja, it is Ash's only mega equivalent and still Ash will not be allowed to keep ownership of it! Why should the writers be so cruel to Ash that they hardly let Ash keep ownership of powerful Pokemon. Why Ash is so cruelly treated by the writers? What is the justification?
Because he is just a marketing tool to promote the most recent game. IKUZEfrog has no business staying in SM, and releasing him on a good note is better than leaving him at Oak's to rot forever IMO. If you hate it, well too bad so sad. Life moves on.